Stereoscopic Image Display and Method for Driving the Same

1. A stereoscopic image display, comprising: a display panel, comprising: data lines; gate lines crossing the data lines; thin film transistors (TFTs) respectively formed at crossings of the data lines and the gate lines; and pixels, each of which is divided into first and second division subpixels; an active black stripe controller configured to: analyze an information of a 3D depth value between left eye image data and right eye image data; compare the 3D depth value with a predetermined threshold value; and assign data copied from the left eye image data and the right eye image data as data to be written to the second division subpixels when the 3D depth value is equal to or less than the predetermined threshold value; a data driving circuit configured to: convert digital data received from the active black stripe controller into a data voltage; and supply the data voltage to the data lines; and a gate driving circuit configured to sequentially supply a gate pulse to the gate lines.

2. The stereoscopic image display of claim 1 , wherein, when the 3D depth value is greater than the predetermined threshold value, the active black stripe controller assigns digital data of a black gray level as data to be written to the second division subpixels.

3. The stereoscopic image display of claim 2 , further comprising a timing controller configured to: control an operation timing of the data driving circuit and an operation timing of the gate driving circuit; and transfer the digital data received from the active black stripe controller to the data driving circuit.

4. The stereoscopic image display of claim 3 , wherein the active black stripe controller is provided in the timing controller.

5. The stereoscopic image display of claim 1 , wherein the display panel is a display panel of one of a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescence device (EL) including an inorganic electroluminescence element and an organic light emitting diode (OLED) element, and an electrophoretic display (EPD).

6. The stereoscopic image display of claim 1 , further comprising: a patterned retarder positioned opposite a screen of the display panel, the patterned retarder configured to convert a polarization characteristic of light incident from the screen of the display panel; and polarization glasses including a left eye polarizing filter and a right eye polarizing filter each having a different polarization characteristic.

7. A method for driving a stereoscopic image display, the method comprising: analyzing an information of a 3D depth value between left eye image data and right eye image data; comparing the 3D depth value with a predetermined threshold value; assigning data copied from the left eye image data and the right eye image data as data to be written to second division subpixels of pixels when the 3D depth value is equal to or less than the predetermined threshold value; converting the left eye image data, the right eye image, and the copied data into a data voltage; supplying the data voltage to data lines of a display panel; and sequentially supplying a gate pulse to gate lines of the display panel.

8. The method of claim 7 , further comprising, when the 3D depth value is greater than the predetermined threshold value, assigning digital data of a black gray level as data to be written to the second division subpixels.

9. The method of claim 8 , further comprising: converting the digital data of the black gray level into the data voltage; and supplying the data voltage to the data lines of the display panel.